Date: Sun, 17 Mar 2002 17:39:10 -0500 From: parv <parv_@yahoo.com> To: f-q <freebsd-questions@freebsd.org> Subject: awk - any possibility of using a variable in regex Message-ID: <20020317223910.GA3245@moo.holy.cow>
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is it impossible to use a variable inside a regex in awk? i tried
the following w/o any success...
{ echo 'polka dot'; echo 'red dot'; } | \
awk -v type=polka ' BEGIN { dot_type=type } /dot_type/ { print }'
...so i had resorted to perl for now.
actual usage is to kill X applications -- xinit, startx -- (from
/usr/share/skel/dot.xinitrc)...
...
if [ -x /usr/X11R6/bin/fvwm2 ]
then
# ...
elif [ -x /usr/X11R6/bin/twm ]
then
# ...
else
echo ' neither fvwm2 nor twm is available/executable; exiting...'
echo ' cleaning up...'
/bin/ps wwaux | \
/usr/local/bin/perl -n -e \
'$usr = $ENV{$USER} ? $ENV{USER} : $ENV{LOGNAME};
if ( m#^$usr.+\b(?:startx|xinit)\b#o )
{
(undef, $pid) = split(/[ ]+/);
print "$pid\n" if ($pid =~ /^\d+$/);
}
' | \
/usr/bin/xargs /bin/kill -9
echo ' ...done'
exit 1
fi
- parv
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